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Enumerate the different parts of Digestive system. Add a note on small intestine
The Different parts of Digestive system
tongue - salivary amylase
pharynx
oesophagus
stomach
duodenum
jejunum
ileum
caecum
ascending colon
transvers colon
descending colon
sigmoid colon
rectum
anus
Accessory organs of digestion
parotid - saliva
sumandibular - saliva
sublingual - salivary glands
liver - bile
pancreas
Small Intestine
Definition
Is the part that is next to the stomach at pyloric sphincter
Extends upto the ileocaecal valve at the junction of the ileum and the Caecum
5 meters
Surrounded by large intestine
The parts
Duodenum : 25 cm
Shape C ; around the head of pancreas.
At mid point : of the "C" opening of the pancreaticobiliary duct guarded by sphincter of Oddi.
Jejunum : middle part of small intestine.
2 metres
Ileum : 3 metres
Ends at the ileocaecal junction ; guarded by ileocaecal valve.
Structure
walls - four layers - mucosa, submucosa, circular muscle, longitudinal muscle, peritoneum (adventitia)
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